Phonograph



(No Model.)

T. A. EDISON. PHONOGRAPH.

No. 414,760. Patented No 12, 1889..

A IlVI/E/VTOR UNITED I STATES PATENT UFFICE.

'lllOMAb A. EDISON, OF LIIEWEIIIIYN PARK, N EKV JERSEY.

PHONOGRAPH.

' SPECIFICATION forming part of Letters Patent No. 414,760, dated November 12,1889.

Application filed March 30, 1889.

To all whom, it may concern:

l-le it known that I, THOMAS A.v EDISON, a citizen of the United States, residing at Llewellyn Park, in the county of ltssex and State of New Jersey, have invented a certain new and useful Improvement in Phonographs, (Case No. 832,) of which the .following is a specification.

In my phonograph I employ a cutting or turning-oft tool acting on the surface of the cylindrical phonogram-blank for removing a former record and preparing the surface to receive a new record. One difficulty which has occurred in doing this is that. of disposing of the chips or shavings which are removed by the cutting-tool and which I find become electrified, so that they fly in all directions, and sometimes clog the various parts of the apparatus.

- The main object of my invention is to effeotively avoid this difficulty; and to this end my invention consists partly in an improved form or construction for the cutting tool, whereby it can out only a very thin chip or shaving from the phonogram blank, and partly in the arrangement of a chute or passage for receiving the material removed by the cutting-tool and conveying it to a receptacle provided for it. I

My invention isillustrated in the accompanying drawings.

Figure 1 is an end view of a portion of the phonograph embodying my invention, showin g the cylindrical phonogran1-blank,the spectacle-frame which carries the recorder and reproducer, and the adjusting devices; Fig. 2, a vertical section of the recorder; Fig. 3, a bottom plan View of the same; Fig. 4, a view on an enlarged scale showing the position of the turning-oif tool, and Fig. 5 a bottom view of the conveying-chute.

A is the cylindrical phonogram-blankunade of suitable material for receiving and reproducing the impressions of the sound-waves.

B is the r0cking-arm which holds the spectacle-frame C and which carries the recorder and reproducer.

D is the automatic adjusting device set forth in my application, Serial No. 296,420, filed January 15, 1889, for automatically adjusting Serial No. 305,483. (No model.)

the position of the recording-point relative to the surface of the phonogram-blank.

a is the recording-point, and b theturningoff tool traveling on the cylinder in advance as shown in Fig. at, having a straight cuttingedge at (Z and a beveled portion 0. The cutting is done, as shown in Fig. 4, only by the straight edge (I, the beveled portion 6 resting on the shoulder formed by the uncut portion of the cylinder and preventing the cuttingedge from. entering the cylinder too deeply, whereby the knife can out only a very thin shaving, just deep enough to entirely remove the traces of the previous record.

Secured to the rim of the recorder portion of the spectacle-frame by means of a screw f, passing through the end of the lug g, is a conveying-chute E. This consists-of a curved box made of suitable metal or other material and carried in such position that its upper end is immediately in front of and in close proximity to the edge of the cutting-tool. The chute has a narrow opening hat its lower front edge, and aboie this opening the upper end of thechute overhangs the edge of the cutting-tool, so that the chip or shaving removed from the cylinder by such tool is necessarily projected upwardly through the opening it and into the chute, and it is conveyed by gravity into any suitable receptacle provided for it. The shaving striking the upper side of the chute is broken up into small particles, which particles are also unelectriiied by the contact, so that they pass freely by gravity through the chute and fall into the place assigned for them.

lVhat I claim is I. In a phonograph, the combination, with a cutting-knife acting on the phonogram-surface, of a conveyingchute in proximity thereto, substantially as set forth.

2. In a phonograph, the combination, with a cutting-knife acting on the phonogram-surface, of a conveying-chute having an opening opposite the cutting-edge and overhanging such edge, substantially as set forth.

8. In a phonograph, the combination, with the spectacle-frame, of the recording-pointand cutting-t0ol carried thereby, and a conveyiug-chute also carried by said frame in proximity to said cutting-tool, substantially as set forth.

l. In a phonograph, the cutting-tool having a straight cutting-edge and a beveled extension of such edge, substantially as set forth.

In a phonograph, the cutting-tool having a straight cutting-edge and an extension of 10 such edge in a different plane, substantially as set forth.

This specification signed and witnessed this 22d day of March, 1889. Y

'JI'IOS. A. EDISON. Vitnesses:

\V. PELZER, RICHD. N. DYEI-l. 

